Emma Stone auditions in her bedroom for "Easy A," one of her first movies.

The audition that made Jason Momoa win the role of Khal Drogo in HBO's "Game of Thrones". Jason did the Haka, which is a traditional ancestral war cry, dance or challenge from the Māori people of New Zealand.

Aaron Paul Breaking Bad Audition Tape

Morgan Saylor auditions for the role as Dana Brody in the award-winning series, 'Homeland', starring Damian Lewis and Claire Danes.

Steve Carell auditions for the role of 'Brick Tamland' in the comedy classic 'Anchorman', also starring Will Ferrell as 'Ron Burgundy'.

This is Michael Cera's audition for "Evan" in "Superbad"

Matthew McConaughey auditions for Rickard Linklater's DAZED AND CONFUSED in the early '90s.

Tom Hanks auditioning and screen testing for the lead role in the academy award winning movie, "Forrest Gump" (1994). Included in this reel is actress Robin Wright, who plays the supporting role of 'Jenny' in the film.

Russell Brand auditioning for the role as 'Aldous Snow' in the hit comedy, 'Forgetting Sarah Marshall' (2008), starring Jason Segel.

Dafne Keen's audition tape for Logan with Hugh Jackman

Marlon Brando screentest

This is the firts screen test of Kate for Titanic. Oh my god, this girl is wonderful. I think the guy called Jeremy Sisto. By Holly Hunter's boyfriend in the movie Thirteen.

See Chris Pratt and Dave Bautista before they were Star-Lord and Drax in their screen test for Marvel's "Guardians of the Galaxy,"